Money is a wonderful invention just think of the massive bookkeeping problem we would have if we did everything by barter the number plying the oldest profession would pale to insignificance compared to the number of accountants

I am old enough to remember pre war prices when we got 5 us dollars to the pound compared to the amount of hours worked to provide it some things like houses have become much more expensive while technical things like cars, phone calls , and communications. are cheaper (you could buy a house for the cost of an hours phone call to the USA or a large TV).

Speed is of course a vector quantity but due to the geometry of the aircraft your speed can only add or subtract from the speed of the aircraft relative to the ground excluding SR.If you were in a large saucer shaped alien UFO and could run in any direction the angle relative to the craft would have to be taken into account.Warning do not try this on a Ryanair trip !

I hope this does not infringe copyright but I thought it to good not to spread"WINDOWS: Please enter your new password.USER (Luke Carter): potatoWINDOWS: Sorry, the password must be more than 8 characters.USER (Luke Carter): boiled potatoWINDOWS: Sorry, the password must contain 1 numerical character.USER (Luke Carter): 1 boiled potatoWINDOWS: Sorry, the password cannot have blank spaces.USER (Luke Carter): 20damnedboiledpotatoWINDOWS: Sorry, the password must contain at least one uppercase character.USER (Luke Carter): 20DAMNEDboiledpatatoWINDOWS: Sorry, the password cannot use more than one uppercase character consecutively.USER (Luke Carter): 20DamnedBoiledPatatoYouIdiotGiveMeAccessNow!WINDOWS: Sorry, the password cannot contain punctuation.USER (Luke Carter): IWillHuntYouDown20DamnedBoiledPatatoYouIdiotGiveMeAccessNowWINDOWS: SORRY, THAT PASSWORD IS ALREADY IN USE.

The only danger warning I have seen on a mobile phone transmitter tower was in Germany which said don't stand too close in winter as large icicles fall off. I understand in the USA 6500 deaths a year result from people driving, walking etc. while using them that's where the danger lies